H. Fiedorowicz et al., Investigations on femtosecond-pulse-driven soft X-ray lasers using a gas puff target irradiated with a Ti : Sapphire laser, J PHYS IV, 11(PR2), 2001, pp. 197-200
Experimental investigations on soft x-ray lasers based on optical field ion
ization of gases with an ultrashort-pulse terawatt laser system are present
ed, The x-ray laser active medium was created using an elongated gas puff t
arget formed by pulsed injection of a small amount of gas from a high-press
ure electromagnetic valve through a nozzle in the form of a slit. The targe
t was irradiated with a laser pulses from a 20-fs, 50-mJ Ti: Sapphire (Ti:S
) laser system Both recombination and collisional soft x-ray laser scheme h
ave been studied. Soft x-ray spectra from nitrogen. oxygen and xenon target
s are presented and discussed.